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杂交水稻幼苗３℃胁迫３６ｈ后，超氧物歧化酶（ＳＯＤ）活性和ＡＴＰ含量明显下降，膜脂过氧化作用加强，膜透性增大。当用１０￣（－５）ｍｏｌ／ＬＡＢＡ预处理幼苗后，ＳＯＤ活性和ＡＴＰ含量下降受到抑制，膜脂过氧化作用减弱，膜透性降低。同位素示踪表明，ＡＢＡ使幼苗ＳＯＤ活性增强的原因是促进了ＳＯＤ的再合成，而不是激活其活性。同时证明，膜脂过氧化与ＳＯＤ活性的变化有着密切联系。
Under 36 ℃ for 3 hours, the activities of superoxide dismutase (SOD) and the content of ATP in hybrid rice seedlings decreased obviously, the membrane lipid peroxidation strengthened and membrane permeability increased. When the seedlings were pretreated with 10 ~ (-5) mol / L LABA, the decrease of SOD activity and ATP content was inhibited, the membrane lipid peroxidation weakened and the membrane permeability decreased. Isotopic tracing showed that the reason why ABA enhanced SOD activity in seedlings was to promote the resynthesis of SOD rather than activate its activity. At the same time, membrane lipid peroxidation and SOD activity are closely linked.